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Improve performance of ! (replicate) (#1084)

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* Implement ! with weighted repeatCycles
* reimplement repeatCycles without array filling
This commit is contained in:
Alex McLean 2024-05-02 23:37:32 +01:00 • committed by GitHub
parent deed379dba
commit 34e9d73908
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GPG key ID: B5690EEEBB952194
4 changed files with 31 additions and 17 deletions
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21
packages/mini/mini.mjs
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@ -27,6 +27,12 @@ const applyOptions = (parent, enter) => (pat, i) => {
pat = strudel.reify(pat)[type](enter(amount));
break;
}
case 'replicate': {
const { amount } = op.arguments_;
pat = strudel.reify(pat);
pat = pat._repeatCycles(amount)._fast(amount);
break;
}
case 'bjorklund': {
if (op.arguments_.rotation) {
pat = pat.euclidRot(enter(op.arguments_.pulse), enter(op.arguments_.step), enter(op.arguments_.rotation));
@ -67,26 +73,13 @@ const applyOptions = (parent, enter) => (pat, i) => {
return pat;
};
function resolveReplications(ast) {
ast.source_ = strudel.flatten(
ast.source_.map((child) => {
const { reps } = child.options_ || {};
if (!reps) {
return [child];
}
delete child.options_.reps;
return Array(reps).fill(child);
}),
);
}
// expects ast from mini2ast + quoted mini string + optional callback when a node is entered
export function patternifyAST(ast, code, onEnter, offset = 0) {
onEnter?.(ast);
const enter = (node) => patternifyAST(node, code, onEnter, offset);
switch (ast.type_) {
case 'pattern': {
resolveReplications(ast);
// resolveReplications(ast);
const children = ast.source_.map((child) => enter(child)).map(applyOptions(ast, enter));
const alignment = ast.arguments_.alignment;
const with_tactus = children.filter((child) => child.__tactus_source);